“"Split back design with button closure." What does that part of the product description mean? I'm envisioning the back as like a hospital gown, flapping totally open except for 1 little button. Is that accurate? Is the back made of two pieces of fabric that are not connected at all except for by 1 button, leaving most of my spine and my bra-back totally exposed to view?”
I wondered the same thing.
Look at http://www.zappos.com/ariat-nelly-top-white?ef_id=V6eo7wAAASXsqhjy:20160811042429:s
It looks adorable, with a 3" slit to get your head through and a nice little white button closure. The lace part repeats on the back (such a bonus when the back is as pretty as the front). The slit is down to the solid part of the shirt.